The Spanish Flu

In 1918-1920 there spread a deadly influenza pandemic.
It infected over 500 Million people across the world, including remote pacific islands and the artic.
It killed between 50-100 Million people which killed 3-5% of the worlds population at that time.
(It killed 5-10 more times many people that the WW1 did.)

The deadly disease triggered mainly kids,young adults and old aged people.
It was spread at the end of WW1, when solders were coming back home from fighting.
This spread the disease to the whole world.
(The total death toll in New Zealand for the Spanish Flu was thought to be over 8,600.
The death toll for New Zealand in the WW1 was 16,697)

The Spanish flu was everywhere but newspaper reports were not allowed to report accurately on the illness or amount of people dead in the country that were involved in the WW1.
So people would not freak out and think that their solders were dieing and that leads to them losing the war.
But because Spain was a neutral country and didn't go to war their reports were accurate and seemed much higher that the other countrys.
This made people think that Spain was the most hard hit place, therefor the nickname for this disease was called the Spanish flu.